Machine for shaping uppers over lasts



Dec. 8, 1936. c. F. PYM

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Aug. 2, 1935 5 Sheets-Sheetl Dec. 8, 1936. Q E PYM 2,063,193

MACHINE FOR SHAPING UPPERS OVER 'LASTS Filed Aug. 2, 1935 3 Sheets-Sheet5 v f K l/ I tip/1.

Patented Dec. 8, 1936 UNITED STATESv PATENT OFFICE MACHINE FOR SHAPINGUPPERS OVER LASTS tion, Paterson, N. J.,

Jersey a corporation of New Application August 2, 1935, Serial No.34,413

18 Claims.

This invention relates to machines for shaping uppers over lasts and isherein illustrated in its application to a lasting machine having meansfor drawing an upper over a last successively in different locationsalong the margin of the shoe bottom and means for fastening theoverlasting margin of the upper to an insole having a plane bottom face.It is to be understood, however, that the invention in its broadestaspects is not limited toa machine of the particular type illustrated.

An object of the invention is to provide, in a machine for shapinguppers over lasts, means for moving the work relatively to devices forengaging and holding the overlasting margin thereby to draw theoverlasted'margin inwardly over the insole, thus obviating therequirement of a complicated gripper mechanism for pulling the upperover the last, as provided in machines of this sort heretofore employed.With the above object in view, the present invention, in one aspectthereof, provides means, herein illustrated as grippers, for engagingand holding in a fixed position a portion of the overlasting margin ofan upper on its last and means for effecting movement of the workrelatively to said holding means, herein illustrated as a thrust member,whereby the portion of the overlasting margin engaged by the grippers islasted inwardly over an insole on the last bottom; In the illustratedmachine the-thrust member is manually operated in time relation to theclosing of the grippers on the overlasting margin, the closing of thegrippers and the operation of the thrust member preferably beingeffected by a common actuating a means.

These and other features of the invention will now be described withreference to the accompanying drawings and will be pointed out in theappended claims.

In the drawings,

Fig. 1 is a side elevation of the complete machine;

Fig. 2 is a side elevation illustrating the lasting devices, the top andbottom of the machine being broken away and parts of the frame beingbroken away to illustrate underlying parts;

Fig. 3 is a perspective view of the lasting devices illustrated in Fig.2 showing the grippers in their closed position;

Fig. 4 is a side elevation similar to Fig. 2 showing also a crosssection of a last and upper being operated upon;

Fig. 5 is a perspective view showing the fore- 55' part of a shoe andshowing the lasting devices in the same position in which they appear inFig.4; and

Fig. 6 is a fragmental view showing the lasting devices and the work asthey appear in Fig. 4 and illustrating particularly the tack driving op-5- eration.

In the illustrated machine there is incorpo rated tacking mechanism of awell-known commercial type disclosed in Letters Patent of the UnitedStates No. 1,106,393, granted August 11, 10 1914, on an applicationfiled in the name of Fred L. MacKenzie, and this machine has a base l0(Fig. 1) and a head I2 in which is journaled a cam shaft [4 on whichthere is secured a pulley l6 having suitable belt connections with amotor mounted upon the base In. In the forward part of the head i2 thereis mounted a tack driver comprising a bar l8 and a pin extendingdownwardly from the bar and arranged to drive a tack through a suitableopening in a nozzle 22 to which tacks are automatically deliveredthrough a raceway 24. A one-revolution clutch mechanism is arranged toconnect the cam shaft I4 to the motor and to disconnect the cam shafttherefrom after one tack has been driven. The 25 clutch is operated by aknee lever 26 which is pivotally mounted between lugs 28 and 30projecting forwardly from the base In. The details of the tack drivingmechanism are not further described as they are well known in the art. 0

Referring now to Fig. 2, the illustrated lasting grippers comprise astationary gripper jaw 32 formed in the rear face of the tack nozzle 22,the gripping surface extending rearwardly and upwardly at an angle ofapproximately 45 to the 35 horizontal, and a movable gripper jaw 34arranged in opposition to the stationary gripper jaw 32, said movablejaw 34 being formed at the forward extremity of a bell crank lever 36pivotally mounted between the upper ends of a pair of arms 38 (Fig. 3)extending generally heightwise of the machine. At their lower ends thearms 38 are connected by an integral cross head 40 which is supportedupon a cross pin 42 mounted in ears 44 projecting forwardly from abracket 46 secured to the front of the base [0. The ears '44 also serveto position the cross head 40 and the arms 38 extending upwardlytherefrom widthwise of the machine and thus to maintain alinement of themovable gripper jaw 34 with the stationary gripper jaw 32. In order todetermine and to maintain a suitable spacing of the gripper jaws 32 and34 from each other in their open position, as illustrated in Fig. 2, ahorizontal arm 48 is formed integrally with the cross head 4|] andarranged to extend rearwardly therefrom through an opening in the basein, the rearward end of said arm being held from movement heightwise ofthe base by a plate 58 extending heightwise of the base and securedthereto by a clamping screw 52, the upper end of said plate beingslotted for the reception of the arm 48.

For moving the work horizontally forwardly of the machine in order totension that portion 'of the upper held by the grippers over an insoleon the last bottom a thrust member or bar 54 is slidably mounted in aguideway in the head i2 extending from front to back of the head, theforward end of said bar extending downwardly at right angles to the bodyportion of the bar to provide a shoe-engaging member, the shoe-engagingface of which, as illustrated in Fig. 3, is somewhat rounded widthwisethereof in order to permit movement of the shoe relatively to the thrustbar after said member has been advanced to tension the upper over. theshoe bottom. The thrust bar is normally held at the limit of itsmovement forwardly of the machine by a spring 56 one end of which isconnected to the back of the head I2 while the other end is connected tothe rearward extremity of the thrust bar, the forward movement of thebar by the spring 56 being limited by a stop 58, herein illustrated as aheaded pin or plunger, mounted in a bore in a cross head 60 secured tothe thrust bar 54, as'pring 62 being interposed between the head of theplunger and the base of the bore. In order to provide clearance for themovements of the thrust bar 54 forwardly and rearwardly of the machinehead the bell crank lever 36, as illustrated in Fig. 3, is divided intotwo parallel arms beginning at the rearward extremity of the horizontalportion of said lever and extending downwardly therefrom.

For first closing the grippers and thereafter advancing the thrust barto move the work relatively to the grippers a treadle 64 (Fig. 1) ispivotally mounted at the base of the machine and connected by means ofan adjustable link 66 to the forward end of a lever or yoke 68, saidlever having centrally disposed downwardly extending ears 10 which arepivotally mounted between the upper extremities of the bracket 46. Foradvancing the thrust bar 54 a yoke 72 is pivoted between the upperextremities of the bracket 46 coaxially with the yoke 68, said yoke 12being provided with a head 14 (Fig-3) to which there is pivoted a dog 16arranged to extend forwardly from the head 72, said dog having formed atits forward extremity a detent 13 constructed and arranged to engagesuitable ratchet teeth formed in the under surface of the body portionof the thrust bar 5% adjacent to its workengaging portion. The operatingconnections between the treadle-actuated lever or yoke 68 and the bellcrank lever 35 carrying the movable gripper jaw 34 comprise a link 88(Fig. 2) the forward end of which is pivoted to a block 82 pivotallymounted between the lower ends of the downwardly extending arms of thebell crank lever 36, the rearward extremity of said link being'pivotedto another block 84 which, in turn, is pivoted between the ends of theyoke 68. The pivot blocks 82 and 84 areyieldingly urged away from eachother by a compression spring 88 coiledabout the link and positionedbetween said pivot blocks, the extent of separation of the pivot blocksfrom each other being determined by the distance between the head 86 ofthe link SE! and the stop nut 81 mounted thereon. The extent ofseparation of said pivot blocks determines the timing of the advancementof the thrust member 54 with relation to the closing of the gripper jaws32, 34. For swinging the dog it in a clockwise direction as seen in Fig.2 in order to bring the detent 18 into engagement with one of theratchet teeth in the thrust bar 54 a yoke 90 is pivotally mounted on anupwardly extending ear 92 of the pivot block 84 and a headed pin 94 isslidably mounted in a hole in the cross bar of the yoke 90, the upperend of said pin being provided with 'a head 96 which is pivoted to thedog 76. A spring 98 coiled about the pin 94 and interposed between thehead 95 of said pin and the yoke 90 provides a yielding connectionbetween said yoke and the dog it. For advancing the yoke 72 in order tomove the thrust bar forwardly of the machine the cross pin I00 on whichthe pivot block 84 is mounted is extended in opposite directions fromthe yoke 68 and provided with suitable collars I02 for engagement withinrecesses Hi4 provided in the arms of the yoke 12. When the machine is atrest the collars H32 are spaced from the yoke 12 as illustrated in Fig.2 and the detent i8 is disengaged from the thrust bar 54. During thefirst stage of the depression of the treadle 64 the yoke 68 moves intoengagement with the yoke '32, and, at the same time, moves the detent 78into engagement with a ratchet tooth in the thrust bar 54, and alsoadvances the movable grippertd toward the stationary gripper 32 in orderto engage and grip the work before the advancement of the thrust bar 54commences. The advancement of the thrust bar 54 may be timed withrelation tothe closing of the grippers by adjusting the stop nut 81 atthe rear end of the link 80 in order to vary the position of the pivotblock 84 lengthwise of said link. It will be noted, however, that theadjustment of the stop nut 31 does not vary the timing of the engagementof the detent 18 with the thrust bar 54 with relation to the advancementof the yoke 68 since said yoke and the operating connections to the dog'16 are both pivoted to the block 84 and therefore any adjustment of theblock 84 endwise of the link 80 afliects the yoke 68 and the detent '18to the same extent. This construction permits the actuation of thegrippers to be varied for diiferent kinds of work while stillmaintaining the desired timing of the actuation of the detent relativelyo he'advancement of the yoke 12 on which the detent is pivoted.

For returning the yoke 68 and the parts associated therewith to theirinitial positions at the end of the machine cycle a spring M5 is coiledabout the link 553 and positioned between a collar I08 secured to saidlink and a cup H0 supported upon a bracket H2 extending forwardly fromthe bracket 46, upward movement of the link 66 by said spring beinglimited by the engagement of a collar I I4 secured to said link with thebottom of the bracket I l 2.

In lasting shoes in the illustrated machine a shoe to be operated uponis presented in inverted position to the illustrated grippers, theoverlasting margin I !6 (Fig. 4) being positioned between the gripperjaws, the thrust bar 54 being moved rearwardly sufiiciently to permitthe overlasting margin to be presented to the grippers. In order toprovide sufficient space rearwardly of the grippers for large shoes theupper portions of the arms 38 are oifset rearwardly of the machine.After positioning the shoe, the opera ator depresses the treadle 64thereby swinging the yoke 68 in a counterclockwise direction, as seen inFig. 4. During that portion of the movement of the yoke 68 which occursbefore the collars I02 engage the yoke 12 the bell crank lever 36 isswung in a clockwise direction, as seen in Fig. 4, thereby closing thegripper jaws on the overlasting margin H6 and at the same time bringingthe detent 78 into engagement with one of the ratchet teeth in thethrust bar 54. Continued movement of the yoke 68 after the collars I02engage the yoke 12 advances said yoke 12 thereby moving the thrust bar54 forwardly of the machine and moving the work relatively to thegrippers and thereby tensioning the upper I20 over the last I22 anddrawing the overlasting margin of the upper over an insole I24 on thelast bottom. During the advancement of the yoke 12 the spring 88 iscompressed, thereby increasing the gripping action of the grippers 32and 34 and the spring 98 is compressed, thus insuring a firm engagementof the detent 18 with a ratchet tooth in the thrust bar 54. The extentof the tensioning of the upper over the last is controlled by theoperator and it will be seen that the knee lever 26 is operable at anystage of the depression of the treadle 64 in order to set in motion thetack driving mechanism thereby to secure the upper in the lastedposition determined by the operator while the grippers hold the upper insaid position without loss of any of the tension which the operator hasexerted upon it.

If it is desired to drive two tacks to hold the lasting tension this mayconveniently be done by changing the angular disposition of the shoerelatively to the thrust bar 54 after a tack has been driven, therebybringing the tack nozzle 22 out of alinement with the tack alreadydriven and permitting the driving of a second tack. It will be seen thatthe rounded shape of the workengaging portion of the thrust member 54facilitates the movement of the shoe relatively to the thrust memberincidental to the variation of the angular disposition of the shoe priorto driving the second tack.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent of the United States is:

1. A machine for shaping uppers over lasts having in combination meansfor engaging and holding in a fixed position a portion of theoverlasting margin of an upper on its last, a thrust member constructedand arranged to effect movement of the work relatively to said holdingmeans whereby the portion of the overlasting margin engaged thereby islasted inwardly over an insole on the last bottom, and a manuallyoperated actuator for effecting engagement of said holding means withthe overlasting margin and for thereafter advancing the thrust member toan extent determined by the operator.

2. A machine for shaping uppers over lasts having in combination meansfor engaging and holding in a fixed position the overlasting margin ofan upper on a manually supported last, a thrust member constructed andarranged to engage successively various portions of the periphery of theupper presented toit by the operator, and means for advancing saidthrust member thereby to move the work relatively to said holding means.

3. A machine for shaping uppers over lasts having in combination meansfor engaging and holding in a fixed position the overlasting margin ofan upper on its last, a thrust member constructedand arranged to engage,a portion of the upper between the overlasting margin andthe top of theupper and substantially opposite to the portion of the overlastingmargin held in fixed position, and manually-operated means for effectingengagement of said holding means with the overlasting margin and forthereafter advancing the thrust member thereby to. move the workrelatively to said holding means.

4. A machine for shaping uppers over lastshaving in combination meansfor engaging and holding inv a fixed position the overlasting margin ofan upper on a manually supported last, a thrust bar slidably mounted ina guideway in the machine frame and arranged to engage successivelyvarious side portions of the upper presented to it by the operator, andmanuallyoperated means for urging the thrust bar against the shoe.

5. A machine for shaping uppers over lasts having in combination meansfor engaging and holding in a fixed position a portion of theoverlasting margin of an upper on its last, a thrust member constructedand arranged to engage.

a portion of the upper between the overlasting margin and the top of theupper at a point opposite to the portion of the overlasting marginengaged by said holding means, said point being substantially adjacentto the machine frame and the portion of the overlasting margin engagedby said holding means being remotefrom the machine frame, yielding meansfor holding the thrust member at the limit of its advancement, andmanually-operated means for advancing the thrust member in a directionto urge the shoe away from the machine frame.

6. A machine for shaping uppers over lasts having in combinationgrippers constructed and arranged to engage the overlasting margin of anupper on its last and means for pressing against one side of the shoethereby to effect relative movement of the shoe and the gripperswidthwise of the shoe.

7. A machine for shaping uppers over lasts having in combinationgrippers constructed and arranged to engage the overlasting margin of anupper on its last, means for pressing against a side of the shoe remotefrom the portion of the overlasting margin engaged by the grippers,thereby to effect relative movement of the shoe and the gripperswidthwise of the shoe, and a common actuating means for said grippersand said shoe pressing means.

8. A machine for shaping uppers over lasts having in combinationgrippers constructed and arranged to engage the overlasting margin of anupper on its last, means for pressing against one side of the shoethereby to effect relative movement of the shoe and the gripperswidthwise of the shoe, and fastening-inserting means having a constantposition relatively to one of the gripper jaws.

9. A machine for shaping uppers over lasts having in combinationgrippers comprising a stationary gripper jaw and a movable gripper jaw,a member constructed and arranged to move the work relatively to thegrippers, and a manuallyoperated actuator for closing the gripper jawsand thereafter advancing said member to an extent controlled by theoperator.

10. In a machine for operating on shoes, a pair of grippers comprising astationary gripping member and a movable gripping member, a thrust workrelatively to the grippers, and a manuallyoperated actuator for closingthe grippers and for thereafter advancing the thrust member to a limitdetermined by the operator.

11. In a machine for operating on shoes, a pair of gripper memberscomprising a stationary gripping member and a movable gripping member, athrust bar constructed and arranged for movement in a guideway extendingfrom front to back of the machine, yielding means for holding the thrustbar at the limit of its advancement, and manually-operated. means forurging the thrust bar forwardly of the machine. I

12. In a machine for operating on shoes, a pair of grippers, a thrustslide for moving the work relatively to the grippers, means forsuccessively actuating the grippers and the slide comprising a lever,connections between the lever and the slide, and connectionsbetween thelever and the grippers.

13. In a machine for operating on shoes, a pair of'grippers, a thrustslide constructed and arranged to move'the work relatively to thegrippers, a detent constructed and arranged for engagement with ratchetteeth provided in the slide, an actuator, a link connecting the actuatortothe detent, and another link connecting the actuator to the gripperswhereby the grippers areclosed before the detent engages the slide.

14. In a machine for operating on shoes, a pair of grippers, a thrustmember constructed and arranged to move the work relatively to thegrippers, a dog constructed and arranged to engage said thrust member, acarrier for the dog, an actuator, connections from the actuator to the:dog, connections from the actuator to the grip-- pers, and means on theactuator for engaging the carrier after the dog has engaged the thrustmember.

15. In a machine for operating on shoes, a pair of grippers comprising astationary gripper jaw and a movable gripper jaw, a thrust memberconstructed and arranged to move the work rela tively to the grippers, adog constructed and arranged to engage the thrust member, a carrier forthe dog, an'actuator for the carrier so disposed relatively to thecarrier as to provide an interval of lost motion of the actuatorrelatively to the carrier, and means for closing the grippers andeffecting engagement of the dog with the thrust member during saidinterval of lost motion.

16. In a machine for operating on shoes, a pair of grippers comprising astationary gripper jaw and a movable gripper jaw, a thrust memberconstructed and arranged to move the work relatively to the grippers, adog constructed and arranged to engage the thrust member, a carrier forthe dog, an actuator for the carrier so disposed relatively to thecarrier as to provide an interval of lost motion of the actuatorrelatively to the carrier, and connections from the actuator for closingthe grippers and efiecting engagement of the dog with the thrust memberduring said interval of lost motion.

1'7. In a machine for operating on shoes, 2. pair of grippers, and athrust member "for moving the Work relatively to the grippersconstructed and arranged to permit movement of the work transversely ofthe thrust member when said member is in operative engagement with theWOIk.

18. In a machine for operating on shoes, a pair of grippers, and athrust member for moving the work relatively to the grippers constructedand arranged to permit movement of the work transversely or" the thrustmember when said member is in operative engagement with the work, saidmember having a rounded work-engaging surface having the axis of itscurvature disposed heightwise of the work thereby to facilitate movementof the work transversely of said member when the member is in engagementtherewith.

ARTHUR F. PYM, Executor 09 the Will of Charles F. Pym, Deceased.

